Unofficial Spondoolies SP20 thread - page 25.

Digitalmocking

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Quote from: Finksy on March 01, 2015, 07:18:05 PM

Or if you want to save a ton of money over the EVGA's you can use 2880w server Psu's w/ boards, that are more efficient and less than half the price...

Just throwing it out there. For my SP20's I shoot for around 1400-1450 Gh with .67 starting Volts and ~225w per loop. Able to run 3x SP20's per PSU.

Finksy, do you have a link for the PSU/boards? I'd love to just save the space as much as anything else, and I can sell my EVGA PSUs without issue.

Digitalmocking

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Quote from: thepixelgeek on March 01, 2015, 09:37:18 AM

@philipma1957, or anyone with experience.

At this rate, since I'm using 600W'ish, can I run two SP20's off one (120v) EVGA 1300 G2? Safely? I recall you trying that somewhere in the thread, but don't remember the results, if any?

If so, how do I hook it up if I only have two more VGA red slots off the back?

I run two SP20s off of a single EVGA 1300 G2. Actually I run 6 of mine that way, I run two volt settings via the crontab because of heat/noise and electric cost issues during the day. They've been running like this for two months now without a single issue. Here are my volt settings:

miner-FL1451099043# cat mg_custom_mode_day
FAN:0 VS0:605 VS1:615 VS2:605 VS3:615 VMAX:620 AC0:120 AC1:140 AC2:120 AC3:140 DC_AMP:170

miner-FL1451099043# cat mg_custom_mode_night
FAN:0 VS0:640 VS1:660 VS2:640 VS3:660 VMAX:665 AC0:160 AC1:180 AC2:160 AC3:180 DC_AMP:170

During the day 900GH/sec I'm using around 430W at the wall
At night I get 1.2TH/sec and I'm using around 610 at the wall

There are 6 outputs on the back of the PSU, I use one of their "double cables" and plug those into loops 1 and 3 (AC0 and AC2 internally) so I'm sending a little less power down that wire just to make sure I don't have overdraw issues down a single line.

thepixelgeek

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Quote from: thepixelgeek on March 01, 2015, 12:58:15 PM

Quote from: philipma1957 on March 01, 2015, 10:08:35 AM

why not match my settings above exactly make sure you have 1 sp20 on 1 evga 1300 g2.

tell us what you get.

in the first 10 minutes

in the first hour

after 1 day

Here's the first hour:
http://i.imgur.com/qFPT4vp.png?1

Wall A Watt is constant 760W
Ambient temps: 13 °C / 60,60 °C

Here's after day 1:
746W at the wall.
http://i.imgur.com/xPQfiiM.png?1

philipma1957

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'The right to privacy matters'

Quote from: Finksy on March 01, 2015, 09:20:46 PM

Quote from: philipma1957 on March 01, 2015, 09:09:10 PM

your psu works in many setups. but i have reached the point of no need for a psu. i have 6 or 7 evga's all paid for by now.

I also never bothered to do 240 volt wiring.

not knocking server psu's for many your psu is very good .

It's not mine, it's J4bberwock's board (and he did an incredible job on it). I'm just re-selling his gear for North America. I just happen to be passionate about it. Ever since burning through a few cheaper ATX power supplies when I first started and made the switch to server power supplies, I have never looked back. And I'm not saying it's the ideal solution for everybody, I'm just saying everybody else should just buy earplugs and learn wiring Grin

I kid... It's just that the margins nowadays with mining equipment are so slim with manufacturers profiting more from self-mining then selling at ROI-able prices, that we need to save every dollar we can to get our equipment running, without settling for in-efficient PSU's. Anyways I'm done my sales pitch, sorry for getting so off-topic with your thread. I'm not trying to convince you to make the switch, I know you are happy with what you have (and as far as I'm concerned, the EVGA PSU's are among the best you can buy as far as ITX supplies go) I'm just adding alternatives to what has worked for you to people who are starting out.

You are correct it is a good choice if you do not have a psu on hand. running 3 sp20's or 3 s-5's or 4 avalon 4.1's is possible. with the 2880 watt psu.

Finksy

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Quote from: philipma1957 on March 01, 2015, 09:09:10 PM

your psu works in many setups. but i have reached the point of no need for a psu. i have 6 or 7 evga's all paid for by now.

I also never bothered to do 240 volt wiring.

not knocking server psu's for many your psu is very good .

It's not mine, it's J4bberwock's board (and he did an incredible job on it). I'm just re-selling his gear for North America. I just happen to be passionate about it. Ever since burning through a few cheaper ATX power supplies when I first started and made the switch to server power supplies, I have never looked back. And I'm not saying it's the ideal solution for everybody, I'm just saying everybody else should just buy earplugs and learn wiring Grin

I kid... It's just that the margins nowadays with mining equipment are so slim with manufacturers profiting more from self-mining then selling at ROI-able prices, that we need to save every dollar we can to get our equipment running, without settling for in-efficient PSU's. Anyways I'm done my sales pitch, sorry for getting so off-topic with your thread. I'm not trying to convince you to make the switch, I know you are happy with what you have (and as far as I'm concerned, the EVGA PSU's are among the best you can buy as far as ITX supplies go) I'm just adding alternatives to what has worked for you to people who are starting out.

philipma1957

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'The right to privacy matters'

Quote from: Finksy on March 01, 2015, 09:04:46 PM

The DPS 2000's are nice, but still use 240V, require setting up your own fans and are not quite as efficient as the Bladecenter 2880W's (80+ Gold vs Platinum).

Phillip, for $150 you can get the IBM 2880W setup with cables and have twice the power. As far as warranty, when you can replace the PSU itself for ~$50-$60, it's simply a non-issue. And as for being power hungry, the EVGA 1300W G2 is more power hungry than the Bladecenter 2880W, and is even with the DPS-2000BB. Honestly, the only issue is noise, and I'm hoping my fan solution works out to solve that. Re-purposing, that is another matter. You'd need a heck of a PC to require 2880W of power! Cheesy

your psu works in many setups. but i have reached the point of no need for a psu. i have 6 or 7 evga's all paid for by now.

I also never bothered to do 240 volt wiring.

not knocking server psu's for many your psu is very good .

Finksy

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The DPS 2000's are nice, but still use 240V, require setting up your own fans and are not quite as efficient as the Bladecenter 2880W's (80+ Gold vs Platinum).

Phillip, for $150 you can get the IBM 2880W setup with cables and have twice the power. As far as warranty, when you can replace the PSU itself for ~$50-$60, it's simply a non-issue. And as for being power hungry, the EVGA 1300W G2 is more power hungry than the Bladecenter 2880W, and is even with the DPS-2000BB. Honestly, the only issue is noise, and I'm hoping my fan solution works out to solve that. Re-purposing, that is another matter. You'd need a heck of a PC to require 2880W of power! Cheesy

philipma1957

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'The right to privacy matters'

server psu's are safe they do niot break or burn up.
they can be very loud.
some are power hungry.

if you get a delay on an evga 1300 g2 it can be 150 usd. 10 year warranty.

for me since I still build custom pc's for people I get the evga's. if you give up mining they can repurpose easy

mavericklm

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if you want earplugs i hear that IBM 2880w PSU is the be(a)st!

go with dps2000bb, board and cables from here http://gekkoscience.com/products/IBM2K_board.html

i use 2 sp20 on 1 dps200bb

Finksy

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I've had success with the DPS 800 GBA's as well as the IBM 2880w PSU's that I am also conveniently selling Boards for

Honestly, I've hardly heard of any problems with any server PSU's, you just can't kill them. And, even in worst case scenario the actual PSU's are cheap to replace if you re-use the breakout board. Holybitcoin.com sells boards and packages for the smaller PSU's produced by J4bberwock, and I'm selling the IBM 2880W Bladecenter H boards. The only issues with using the 2880W PSU's is they require 240V and the fans are quite loud (Slightly louder than an SP20 at full tilt). I am currently working on some alternative fan solutions to make them more home-miner friendly. Other than those points, there is no better solution on the market for PSU.

Alternatives are gigampz for the DPS 800GBA (1000w)
Sidehack on this forum also produces boards for various PSU's

thepixelgeek

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Quote from: Finksy on March 01, 2015, 07:18:05 PM

Or if you want to save a ton of money over the EVGA's you can use 2880w server Psu's w/ boards, that are more efficient and less than half the price...

Just throwing it out there. For my SP20's I shoot for around 1400-1450 Gh with .67 starting Volts and ~225w per loop. Able to run 3x SP20's per PSU.

Unfortunately already have/purchased the EVGA's. I suppose I could resell them.

Just now learning about server grade psu.

Do you have a specific brand in mind?

Finksy

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Or if you want to save a ton of money over the EVGA's you can use 2880w server Psu's w/ boards, that are more efficient and less than half the price...

Just throwing it out there. For my SP20's I shoot for around 1400-1450 Gh with .67 starting Volts and ~225w per loop. Able to run 3x SP20's per PSU.

philipma1957

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'The right to privacy matters'

Quote from: thepixelgeek on March 01, 2015, 01:25:39 PM

Quote from: philipma1957 on March 01, 2015, 01:10:18 PM

so you are doing 760 with meter and 1300 or 760/1300 = .5846 I am

781/1349 = 0.5789 very close.

that is about what these do at 1300 gh settings.

check your numbers in a ½ day they should stay close to that.

then you can go low.

.631
.631
.631
.631

.641 max

240 watts
240 watts
240 watts
240 watts

reboot at 1000

Perhaps a typo, but did you mean to only lower the volts to .631 and keep the watts the same? Your images show 180 watts, not 240 as you typed above. Also, I just purchased another 1300g2 so I will keep hash higher on both sp20's.
Many thanks!

on lower volt settings you can try either watt setting. on higher volt settings use the high setting.

the machine's software tries to use the highest volts (from the volts you set) it can use without passing the watts you set.

so on high volts with a low watt setting the software can be confused.

Some of your settings of .67 had low watts 160 I think that can confuse the software.

so .67 with 240 fine
.63 with 240 fine

.67 with 180 ?
.63 with 180 fine

hope that helps.

thepixelgeek

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Quote from: philipma1957 on March 01, 2015, 01:10:18 PM

so you are doing 760 with meter and 1300 or 760/1300 = .5846 I am

781/1349 = 0.5789 very close.

that is about what these do at 1300 gh settings.

check your numbers in a ½ day they should stay close to that.

then you can go low.

.631
.631
.631
.631

.641 max

240 watts
240 watts
240 watts
240 watts

reboot at 1000

Perhaps a typo, but did you mean to only lower the volts to .631 and keep the watts the same? Your images show 180 watts, not 240 as you typed above. Also, I just purchased another 1300g2 so I will keep hash higher on both sp20's.
Many thanks!

philipma1957

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'The right to privacy matters'

so you are doing 760 with meter and 1300 or 760/1300 = .5846 I am

781/1349 = 0.5789 very close.

that is about what these do at 1300 gh settings.

check your numbers in a ½ day they should stay close to that.

then you can go low.

.631
.631
.631
.631

.641 max

240 watts
240 watts
240 watts
240 watts

reboot at 1000

here is a low miner.

around 1120gh

lower watts temps

settings these should let you do 2 miners on 1 evga 1300g2

thepixelgeek

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Quote from: philipma1957 on March 01, 2015, 10:08:35 AM

why not match my settings above exactly make sure you have 1 sp20 on 1 evga 1300 g2.

tell us what you get.

in the first 10 minutes

in the first hour

after 1 day

Here's the first hour:
http://i.imgur.com/qFPT4vp.png?1

Wall A Watt is constant 760W
Ambient temps: 13 °C / 60,60 °C

Biodom

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Quote from: philipma1957 on March 01, 2015, 10:08:35 AM

why not match my settings above exactly make sure you have 1 sp20 on 1 evga 1300 g2.

tell us what you get.

in the first 10 minutes

in the first hour

after 1 day

OP wants to be below 700w and with 0.67 he will probably be above 700w.
It is also interesting that OP has 85C on all four of his loops-this is unusual, maybe going to auto (from fan 10) is warranted.
I did not notice what is his ambient temp.

philipma1957

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'The right to privacy matters'

why not match my settings above exactly make sure you have 1 sp20 on 1 evga 1300 g2.

tell us what you get.

in the first 10 minutes

in the first hour

after 1 day

philipma1957

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'The right to privacy matters'

Quote from: thepixelgeek on March 01, 2015, 09:46:58 AM

I keep tweaking but can't seem to get above 1200GH and stay under 700W.

I've increased my volts to .66, max .67, watts at 160. Is it better to increase volts or watts at this point?

okay first step is what does your power cost.

If it is under 10 cents higher clocks make sense

If it is 15 cents you want low clocks.

Second step how many of these machines do you have 2?

third step. your volts are 2 high for your watts. if you want 1 machine on 1 evga 1300 g2

do
.66
.66
.66
.66

.67

watts
240
240
240
240

look at a machine setup to run alone on an evga 1300 g2

note temps note watts = 833 this is false based on my kill a watt I use 781

settings for this machine

thepixelgeek

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I keep tweaking but can't seem to get above 1200GH and stay under 700W.

I've increased my volts to .66, max .67, watts at 160. Is it better to increase volts or watts at this point?

Topic: Unofficial Spondoolies SP20 thread - page 25. (Read 126198 times)